c clifton d



June 2, 1925. Y V

a c. D. PETTIS METHOD OF HOLDING EXPANDED-METAL OR SIMILAR BRAKE SHOEmsim'fs Filed April 11, 1924 y WH 35 by, v referenceqto thefellowing;specification Eigafi ofianloptional formaof positioning Patented J une2, 1925.

, METHOD 0Enonmma nxrmvmzb mnman oft-SIMILARmmxmsnonmsnn'rs;

Applicatiom filed A-pril 11, 1924'. Serial 1N 0. 705,779.

flaallzwhom it maywomern: 1

insert Bait-known that I; GLIFanem-D. P ETTI'SflaI' citizens of. theUnited States, residing in; New Yfiiak. city,

useful Improvements in, Methods of ,Hold ing Expanded-Metal or SimilarBrake Shoer Inserts; ,of whieh-ithe fellewing is atsp'ecification. i r

, a This invention-relatesto the menu faeture of brakeshoes but. mot-epartieula-rly to,

methodsvofz' holding-expanded ,m'etali .orrothe-r insertsin themoldrduri-ng theanolding opw station, and lrasfenits: primary; ohieetrto, pneyent, the :insert from, fleeting or becom} ing displaced within-the: meld ,cavity when the melted metaL-isrpou-reds I a It, is: commonpraetiee-to ineorporateL-in the casting a bundle eofestripsgofzie-Xpa-nded metal and ithfi ef have generally; been .b0und together, bywires, passing through! .t'hQrQpenf ingsfina the metal. Thisblmdleeormattress iSs then placed, inwthe mold and, the. metal ppulfediin, theusual rma-nnern No, satisfaetor'ry means:-vhas hetetoforeebeen;employed1,t0 prevent the bundle from floatin g or.'becom+ mg displacedX when the melted metal enters the nold cavity, sofaraslsam aware-J Thisdestroysthea efieetiveness of) the: expanded metahwhich shouldbeat theface of the sheer Tolobviate this; L, have, devised: a method of .Vppsitioning' the insert: withinthe mold: a v f W The many, other.objeets and advantages f;- my; invention Will 1 be; better. understoedwhen considel'fidih geonneetiom with the caecompanying drawingillustratingce ztaln ,se:

lecte d embodiments thereof.,in,vvhieh Fig. l. is .a; side .elew'ationhof'a brake. shoe Fig.1 2:,isaa transverse seetion 1 on, the: line 2;-2df :Eig ,1,,and;, v A r ,Fi 3;:isiattranss erse, seetionhsimilartoReferringttoxtherdraw ng, therbrakesho insert 10 c umpr sesaebundle qrmattressflof st B$v have six "i111. of, exp nded metals h s t ipe wuheldge e i y in. the ;-c0u1i1ty-r-and State of; New; Yonla ,havm lnventedicertain: new; and

prepared} for manganese the mold looped -Wires 11 and 12 preferablynear, the: ends of the bundle. As each of these loops.

is the same in construction; only onewvillbe described. 1 V

T1165 wire 11" is preferably; inserted;

through ztheaopen'ings inatliemXpaIldd metal from '1 the; face .12:offthe: bundle towardet-he' amid the ends bentgoutwardlypas' 3111145314?This swine is"; preferably; in thei shape-of ahairpin:When::itiis-insrted r-inthebundle:

" In the form sl iownuin Fig; 3f; the bent out ends-{15 of the fw-i-re;are-slightly longer; than in the form, illustrated 3 in; Fig, 2:; and;are bent down; as a-t-16 to {fit snugly betweenz the siderwalls oifftheireinforcing backg-orshell 17 1' The-heightfromthe face of the-.bundleiothe top of; theuportion ofsthe Wire! forming the-bentwm ends14hr-15determines wthe spacing of this face from the face-0f,thecastmeta-l body, ,7 When-,1 th'e;-insert. -is toi be held; snuglyagainst r the 5 Wall ,of the Imeld -cavity, I gem era-lly incline thewiresislightlyi :permit them .-to project! artrifievfurther from the topface; ofthe-t-lmold than the actual spaein-g,-,of this .face @fromqthe;oppositesurfaee of the cast, metal body, Tfhelclosing oflthermold thencauses these wiresto act as; slightly againstthea nel d wall. a a

While: my. improved. method is partieu:

compressedsprings. which, force the: insert Walls arehard and Will notpermitthe-zp ro- Y jeeting wiressto penetrate therein, it, is fully applicable toesoft sand I molds wherer these fencing;- shell butr -,tl1is=-is;v not usually necessaryi asethe, locatien 'of" the bundle {trans-,versely; can be! generally determined vy-ith suffieient; aecuraeythythe eyes It: 1s.-0bv1ons thatf-this, transverse positioning; may the aceomplished without:bending -downthe ends oitherw-ireslprovigledthe-lateral: preadacere responds to thew lIlSld/ji d.I'IS'lQHS fz he shell. The insert andshel, are plaeed in the l 7opposite; sum

mold in the usual manner. The outline of.

the finished casting is indicated in dot,

Fig. 3.

An'insert of any kind provided with positioning means functioning in themanner describedcannot float in the mold or become displaced during thecasting opera tion. The form of this positioning means is immaterial solong as it effectively performs this'function and it should'be'distinctly understood that the particular types herein shown anddescribed are for illustration parts of the insert and forming on thetying means one or more members projecting from the insert a distanceequal to the proper spacing of the insertfrom thecorresponding surfaceof the cast metal body.-

2. The method of preparing a multi-part metal insert for placing withina casting mold, which consists in tying together the parts of the insertwith wire and forming on the tying wire a member which projects from aface of the insert substantially a distance equal tothe proper spacingof that face from the opposing wall of the mold cavity.

3. The method of preparing an insert made up of a bundle ofsuper-imposed strips of foraminous metal for placing within a castingmold, which consists in inserting through the openings in the under faceof the bundle the free ends of a substantially U-shaped wire andtwisting together the end portions of the wire above the bundle t0tightly bind the parts of the insert and form on the upper face oftheinsert'a member projecting upwardly therefroma distance equal to theproper spacing, of this face from the opposing wall of the mold cavity.-

4. The method of preparing an insert composed of a bundle ofsuper-imposed strips of foraminous metal for placing within a moldcavity, which consists in pressing through the openings in the underface of the bundle the free ends of a substantial ly U-shaped wire,twisting together the )p'or-v ti'ons of the wire above the bundle totight ly bind the parts and form a member pro-' jecting upwardly fromthe top face of the insert a distance equal to the proper spacing ofthis face-from the opposing face'of the mold wall,'bending the free endsof the wire transversely of the bundle in opposite 1y T-shaped part."

directions, said bent ends forming with the upwardly pro ect ng member asubstantialreadily occur 5. The method of preparing a metal insert for.insertion in a casting mold which consists in attaching-upon the upperface of the insert at longitudinally spaced points substantiallyT-shaped members which project upwardly from said-face a distanceequalto the proper spacing of this face from the top wall of the moldcavity.

6. The method of preparing an insert for placing in a casting mold whichconsists in attaching upon one face: of the insert at longitudinallyspaced points substantially T-shaped' members which project from saidface sufficiently to maintain this face at the proper spacing fromtheopposing wallof the mold cavity, the crossarms of the T in each of saidmembers being formed of sufiicient length-to co-act-with the mold wallsadjacent said opposing wall to prevent lateral movement of theinsert inthe cavity. i H

7. The combination with'an insert to be embedded in acasting, of meansfor posi-' I tioning the insert in the mold cavity during the castingoperation comprising a length of wire enveloping a portion of the insertand having portions thereof projecting from saidinsertsuflicientlytomaintain the'insert at the proper spacing from .the corresponding.walls of'the mold cavity.

8. The combination with an insert tobe embeddedin'a casting, of meansfor positioning the'insert in the'mold cavity duringthe castingoperation comprising a wire loop enveloping a portion ofthe insert withthe freeend portions of the wire twisted together and projecting from aface of the insert a distance equal to the proper spacing of this facefrom the opposing wall of the mold cavity.

9. The combination with an. insert to be embeddedin a casting, ofmeansffor posi tioning the insert in the mold cavity during the castingoperation comprising a length of wire enveloping a portion ofthe lnsert,and the free end portions ofL-said wire being twisted together tosecurely attach the wire to the insert, said endportions projecting'fromthe face of the in} sert suificiently to maintain said, face at the.

proper distance from the opposingwall of the mold "cavity. I l 1 10.Thej'combination with 'a multi-part insert to be embedded in'a1casting,of means for tying'together the parts of the insert and properlypositioning the insert inthe mold cavity during the casting operation,comprising a loop" of wireenveloping portions of thepart's of the insertand the freeend portions of the loop twisted'together, said end portionsbeing caused to project from the face of the insert sufficiently tomaintain said face at'the proper interval fromthe opposing wall of themold cavity.

g 7 1, Th ombination with a multip insert to be embedded in a casting,of means together to cause the wire to tightly bind for tying togetherparts of the insert and said parts, said end portions projectingproperly positioning said insert in the mold from the insertsufliciently to maintain the 1 cavity during the casting operation,cominsert at the proper spacing from the Wall" 5 prising a length ofWire looped about porof said cavity.- 1

tions of the parts of the insert and having the free end portions of theWire twisted CLIFTON D. PETTIS;

